关键词: 全面采矿法, FLAC^3D, 数值模拟, 开挖

Abstract: In overall mining methods，the stability of the roof is very important，which can directly affect the mining operation proceed.Based on the actual situation of No.2608 mining stope in Danyin gold mine，the ore caving distance at the mining stope is optimized.A proper caving distance can guarantee mining work processed smoothly，and also improves the mining efficiency.FLAC^3D is adopted to establish the model of the mining room.The raise tunneling is carried out firstly，and then moved along with the ore vein，The stresses of roof at 2 m,3 m,4 m，are analyzed to get the stress distribution and stress concentration area.It is concluded that 3m is the best distance of ore caving.The research result provides a scientific basis to the actual production of the mine.

Key words: Overall mining method, FLAC^3D, Numerical simulation, Excavation